2008-2013 Cadillac CTS General Discussion Discussion, Misfire - Plugs or coil pack? in Cadillac CTS Second Generation Forum - 2008-2013; Just so yo know ACDelco ignition coils on amazon for $54.. And you do not have to remove manifold on ...

Re: Misfire - Plugs or coil pack?

Just so yo know ACDelco ignition coils on amazon for $54.. And you do not have to remove manifold on DI engine, only the non-DI you might have to.. I just ordered one and have a misfire code on cylinder 3, will report back once replaced...

Re: Misfire - Plugs or coil pack?

Having the same issue - does anyone have a part number for the ignition coils? I found 12629037 using GMPartsDirect, and found some brand new for $35 shipped that look like the one in the picture on the top of page 2 of this thread, but I just wanna be sure.

Devcoll are you replacing yours on your own? If so can you post instructions?

Re: Misfire - Plugs or coil pack?

This may help others with this issue on a CTS4 DI...

I had a CEL and misfire. Used a ELM327 and my phone to read the code. P0305. Switched the coil with #3 didn't get a new CEL but the misfire count on #3 was raising. Went to the local auto parts store bought a coil for something like $60 and new plugs. Put all 6 plugs in and the coil on, in the parking lot in like 30 minutes! With a 3/8 ratchet, 10mm socket, 5/8 plug socket and 6" extension.

Point is $400 per coil or $300 to change the plugs is an absolute rip off anyone can do this. If I didn't have to leave on a long trip I probably would have paid it, glad I was forced to fix it myself.

Re: Misfire - Plugs or coil pack?

it amazes how much dealers/shops charge for certain items. Like new brake pads easy peasey, and
spark plugs/coils easy peasey (on some engines). My 1995 Impala SS with LT1 engine, not so easy
to do plugs, no wonder they charged $800? But a lot of things are simple, I changed the plugs in my
Dodge took me about an hour and I'm slow. Find a neighbor kid who likes to work on cars to do easy
not too technical things. The kid across the street from me likes to work on cars, his day job is a mechanic
at the local John Deere store. He loves crawling around underneath cars, I use him quite often. thanks,
douglas

Re: Misfire - Plugs or coil pack?

GM built a car (it was the Monza, I believe) and they stuffed a V-8 into that little bad boy. To change the las plug on the right bank you had to loosen the engine mounts and jack up the engine. Guess how many of those cars had one bad plug in them? Stupid.

Re: Misfire - Plugs or coil pack?

Another famous tough plug is #6 on the turbo Buicks. The first time I did it, it took twice as long to change that one plug than it took to do the other 5 plugs combined. Now I know the trick and it's not bad time wise, but still a pain to do that one. It does involve 2 extensions and a universal joint.